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91 lines
2.6 KiB
C
91 lines
2.6 KiB
C
/* Convert characters in input buffer using conversion descriptor to
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output buffer.
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Copyright (C) 1997-2020 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <assert.h>
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#include <dlfcn.h>
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#include <stddef.h>
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#include <sys/param.h>
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#include <gconv_int.h>
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#include <sysdep.h>
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int
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__gconv (__gconv_t cd, const unsigned char **inbuf,
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const unsigned char *inbufend, unsigned char **outbuf,
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unsigned char *outbufend, size_t *irreversible)
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{
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size_t last_step;
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int result;
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if (cd == (__gconv_t) -1L)
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return __GCONV_ILLEGAL_DESCRIPTOR;
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last_step = cd->__nsteps - 1;
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assert (irreversible != NULL);
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*irreversible = 0;
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cd->__data[last_step].__outbuf = outbuf != NULL ? *outbuf : NULL;
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cd->__data[last_step].__outbufend = outbufend;
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__gconv_fct fct = cd->__steps->__fct;
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#ifdef PTR_DEMANGLE
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if (cd->__steps->__shlib_handle != NULL)
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PTR_DEMANGLE (fct);
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#endif
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if (inbuf == NULL || *inbuf == NULL)
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{
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/* We just flush. */
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result = DL_CALL_FCT (fct,
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(cd->__steps, cd->__data, NULL, NULL, NULL,
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irreversible,
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cd->__data[last_step].__outbuf == NULL ? 2 : 1,
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0));
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/* If the flush was successful clear the rest of the state. */
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if (result == __GCONV_OK)
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for (size_t cnt = 0; cnt <= last_step; ++cnt)
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cd->__data[cnt].__invocation_counter = 0;
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}
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else
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{
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const unsigned char *last_start;
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assert (outbuf != NULL && *outbuf != NULL);
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do
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{
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last_start = *inbuf;
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result = DL_CALL_FCT (fct,
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(cd->__steps, cd->__data, inbuf, inbufend,
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NULL, irreversible, 0, 0));
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}
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while (result == __GCONV_EMPTY_INPUT && last_start != *inbuf
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&& *inbuf + cd->__steps->__min_needed_from <= inbufend);
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}
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if (outbuf != NULL && *outbuf != NULL)
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*outbuf = cd->__data[last_step].__outbuf;
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return result;
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}
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